Hi,
Thank you for verifying that it is a cox.net email address. All email management and server hosting is now done by Yahoo. We no longer have access to the mail server to look behind the scenes. I would first check the Outlook email settings and make sure they match.
Incoming mail settings:
IMAP settings
Server: imap.mail.yahoo.com
Port: 993
Encryption method: SSL/TLS
or
POP settings
Server: pop.mail.yahoo.com
Port: 995
Encryption method: SSL/TLS
Outgoing mail settings:
Server: smtp.mail.yahoo.com
Port: 465 or 587
Requires SSL: Yes
Requires TLS: Yes (if available)
Requires authentication: Yes
If you are using IMAP, then all emails are stored on the Yahoo servers. Then you can delete your email profile in Outlook and add it back in using the instructions at https://help.yahoo.com/kb/update-coxnet-email-settings-outlook-mail-mac-third-party-email-clients-sln36637.html
If this does not work, then you may need to contact Yahoo for support. https://help.yahoo.com/kb/account
Greg
